The U.S. region with large deposits of oil sands is Alaska.

Oil sands, also known as tar sands, are found in the northern part of Alaska, particularly in areas like the North Slope. These deposits contain bitumen, a heavy and viscous form of crude oil, which can be extracted and processed into usable petroleum products. While oil sands are a significant resource, their extraction and processing are challenging due to high costs, environmental concerns, and the remote locations of the deposits. Despite these challenges, Alaska's oil sands are considered a potential future energy source.